You can be anyone as you wish. The most important thing is you should be open to the idea of falling in love or having sex with a male or female without cheating the person you and the person you have been with.
You are free to be straight, bisexual, poly, trans, or whatever you want to be. It is pointless to stress over sexual orientation or whoever you are attracted to. It all depends on you and how you choose to live. Your sexuality is just a part of you and you shouldn’t be ashamed of it.
Sexuality is like some people like to eat pineapple pizza without a second thought while some never want to eat it at any cost. You should never conclude something on the basis of superficial things because once you go deeper, you will always find more and experience things that you have been refraining due to social stigma.